CVE-2026-34766 Electron WebUSB设备验证绕过漏洞

// Conceptual PoC demonstrating the vulnerable logic in Electron main process // This is a simplified simulation of how the flaw could be triggered const { app, BrowserWindow, ipcMain } = require('electron'); let win; app.whenReady().then(() => { win = new BrowserWindow({ width: 800, height: 600 }); win.loadURL('data:text/html,<h1>Vulnerable App</h1>'); // Simulating the vulnerable 'select-usb-device' event handler // In a real scenario, this logic is influenced by the app's specific implementation ipcMain.on('request-usb-device', (event, deviceId) => { // VULNERABLE CODE: // The handler (or logic leading to it) does not strictly validate 'deviceId' // against the list of devices provided by the renderer's filters. const filteredDeviceList = ['device-allowed-1', 'device-allowed-2']; // Attacker influences 'deviceId' to be something outside the list, e.g., 'device-malicious' if (true) { // Simulating unusual logic that bypasses standard checks console.log(`Granting access to: ${deviceId}`); // The callback grants access without checking if deviceId is in filteredDeviceList event.reply('usb-device-selected', deviceId); } }); }); // EXPLOITATION SCENARIO: // 1. Renderer requests USB device with filters. // 2. Attacker manipulates the environment or app logic to force selection of ID 'device-malicious'. // 3. Vulnerable handler accepts 'device-malicious'. // 4. Electron grants access to 'device-malicious' despite it not matching the original filter.